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New Accounting Standards Narrative (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Nov. 24, 2017
Nov. 25, 2016
Nov. 24, 2017
Nov. 25, 2016
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Income Tax Expense (Benefit) $ 12.0 $ 13.6 $ 36.1 $ 47.3
FASB ASU No. 2016-09 [Member]        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Income Tax Expense (Benefit)     $ 0.7